Put a ✓ for divisible and a × for not divisible. The first has been done for you. Number Divisible by 2 3 4 5 6 8 9 10 11 168 ✓ ✓ ✓ × ✓ ✓ × × × 748

If the digit at unit place is 0 or it is divisible by 2 , then the number is divisible by 2 . A number is divisible by 3 and 9 , if the sum of its all digits is a multiple of 3 and 9 or divisibility by 3 and 9 . If the digit at unit place is 0 and 5 , then the number is divisible by 5 . If the number is divisible by 2 and 3 , then the number is divisible by 6 . If the digit at unit place is 0 , then the number is divisible by 10 . If the last two digits of a whole number are divisible by 4 , then the entire number is divisible by 4 . If the last three digits of a whole number are divisible by 8 , then the entire number is divisible by 8 . If the difference between the sum of the digits at odd places (from the right) and the sum of the digits at even places (from the right) of the number is either 0 or divisible by 11 , then the number is divisible by 11 . Number Divisible by 2 3 4 5 6 8 9 10 11 748 ✓ × ✓ × × × × × ✓

Put a ✓ for divisible and a × for not divisible. The first has been done for you. Number Divisible by 2 3 4 5 6 8 9 10 11 168 ✓ ✓ ✓ × ✓ ✓ × × × 275

If the digit at unit place is 0 or it is divisible by 2 , then the number is divisible by 2 A number is divisible by 3 and 9 , if the sum of its all digits is a multiple of 3 and 9 or divisibility by 3 and 9 . If the digit at unit place is 0 and 5 , then the number is divisible by 5 . If the number is divisible by 2 and 3 , then the number is divisible by 6 If the digit at unit place is 0 , then the number is divisible by 10 . If the last two digits of a whole number are divisible by 4 , then the entire number is divisible by 4 . If the last three digits of a whole number are divisible by 8 , then the entire number is divisible by 8 . Add and subtract digits in an alternating pattern. Then check if that answer is divisible by 11 . Number Divisible by 2 3 4 5 6 8 9 10 11 275 × × × ✓ × × × × ✓

Put a ✓ for divisible and a × for not divisible. The first has been done for you. Number Divisible by 2 3 4 5 6 8 9 10 11 168 ✓ ✓ ✓ × ✓ ✓ × × × 5500

If the digit at unit place is 0 or it is divisible by 2 , then the number is divisible by 2 A number is divisible by 3 and 9 , if the sum of its all digits is a multiple of 3 and 9 or divisibility by 3 and 9 . If the digit at unit place is 0 and 5 , then the number is divisible by 5 . If the number is divisible by 2 and 3 , then the number is divisible by 6 . If the digit at unit place is 0 , then the number is divisible by 10 . If the last two digits of a whole number are divisible by 4 , then the entire number is divisible by 4 . If the last three digits of a whole number are divisible by 8 , then the entire number is divisible by 8 . Add and subtract digits in an alternating pattern. Then check if that answer is divisible by 11 . Number Divisible by 2 3 4 5 6 8 9 10 11 5500 ✓ × ✓ ✓ × × × ✓ ✓

Put a ✓ for divisible and a × for not divisible. The first has been done for you. Number Divisible by 2 3 4 5 6 8 9 10 11 168 ✓ ✓ ✓ × ✓ ✓ × × × 1035

If the digit at unit place is 0 or multiple of 2 , then the number is divisible by 2 A number is divisible by 3 and 9 , if the sum of its all digits is a multiple of 3 and 9 or divisibility by 3 and 9 . If the digit at unit place is 0 and 5 , then the number is divisible by 5 . If the number is divisible by 2 and 3 , then the number is divisible by 6 . If the digit at unit place is 0 , then the number is divisible by 10 . If the last two digits of a whole number are divisible by 4 , then the entire number is divisible by 4 . If the last three digits of a whole number are divisible by 8 , then the entire number is divisible by 8 . Add and subtract digits in an alternating pattern. Then check if that answer is divisible by 11 . Number Divisible by 2 3 4 5 6 8 9 10 11 1035 × ✓ × ✓ × × ✓ × ×

Put a ✓ for divisible and a × for not divisible. The first has been done for you. Number Divisible by 2 3 4 5 6 8 9 10 11 168 ✓ ✓ ✓ × ✓ ✓ × × × 2158

If the digit at unit place is 0 or multiple of 2 , then the number is divisible by 2 . A number is divisible by 3 and 9 , if the sum of its all digits is a multiple of 3 and 9 or divisible by 3 and 9 . If the digit at unit place is 0 and 5 , then the number is divisible by 5 . If the number is divisible by 2 and 3 , then the number is divisible by 6 . If the digit at unit place is 0 , then the number is divisible by 10 . If the last two digits of a whole number are divisible by 4 , then the entire number is divisible by 4 . If the last three digits of a whole number are divisible by 8 , then the entire number is divisible by 8 . If the difference between the sum of the digits at odd places (from the right) and the sum of the digits at even places (from the right) of the number is either 0 or divisible by 11 , then the number is divisible by 11 . Number Divisible by 2 3 4 5 6 8 9 10 11 2158 ✓ × × × × × × × ×

Put a ✓ for divisible and a × for not divisible. The first has been done for you. Number Divisible by 2 3 4 5 6 8 9 10 11 168 ✓ ✓ ✓ × ✓ ✓ × × × 8370

If the digit at unit place is 0 or multiple of 2 , then the number is divisible by 2 . A number is divisible by 3 and 9 , if the sum of its all digits is a multiple of 3 and 9 or divisibility by 3 and 9 . If the digit at unit place is 0 and 5 , then the number is divisible by 5 . If the number is divisible by 2 and 3 , then the number is divisible by 6 . If the digit at unit place is 0 , then the number is divisible by 10 . If the last two digits of a whole number are divisible by 4 , then the entire number is divisible by 4 . If the last three digits of a whole number are divisible by 8 , then the entire number is divisible by 8 . Add and subtract digits in an alternating pattern. Then check if that answer is divisible by 11 . Number Divisible by 2 3 4 5 6 8 9 10 11 8370 ✓ ✓ × ✓ ✓ × ✓ ✓ ×

The least prime number with consecutive digits is

HARD

6th ICSE

IMPORTANT

ICSE NumbersWiz 6>Chapter 7 - Playing With Numbers>Exercise>Q 12

Who am I?

I am a $2$ -digit prime number . My tens digit is $5$ and my ones digit is a prime number.

EASY

6th ICSE

IMPORTANT

ICSE NumbersWiz 6>Chapter 7 - Playing With Numbers>Exercise>Q 12

I am a $2$ -digit prime number. The total of my digits is a prime number greater than $13$ . Who am I?

HARD

6th ICSE

IMPORTANT

ICSE NumbersWiz 6>Chapter 7 - Playing With Numbers>Exercise>Q 1