ICSE MATHEMATICS - 6>Chapter 4 - Playing with Numbers>SPEEDY TEST>Q 11

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IMPORTANT

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is a pair of numbers which are not co-prime. $[(4, 15) / (7, 16) / (12, 35) / (9, 48)]$

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Important Questions on Playing with Numbers

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ICSE MATHEMATICS - 6>Chapter 4 - Playing with Numbers>SPEEDY TEST>Q 12

The greatest number that exactly divides

375

and

625

is _____

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ICSE MATHEMATICS - 6>Chapter 4 - Playing with Numbers>SPEEDY TEST>Q 1

The sum of two prime numbers is always a prime number.

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ICSE MATHEMATICS - 6>Chapter 4 - Playing with Numbers>SPEEDY TEST>Q 2

If an even number is divided by $2$ , the quotient is always odd.

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ICSE MATHEMATICS - 6>Chapter 4 - Playing with Numbers>SPEEDY TEST>Q 3

1

is the number which is neither prime nor composite.

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ICSE MATHEMATICS - 6>Chapter 4 - Playing with Numbers>SPEEDY TEST>Q 4

All prime numbers are odd.

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ICSE MATHEMATICS - 6>Chapter 4 - Playing with Numbers>SPEEDY TEST>Q 5

A number, which is divisible by

5

and

10

, is also divisible by

50

.

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6th ICSE

IMPORTANT

ICSE MATHEMATICS - 6>Chapter 4 - Playing with Numbers>SPEEDY TEST>Q 6

If a number is divisible by

9

, it is also divisible by

3

.

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IMPORTANT

ICSE MATHEMATICS - 6>Chapter 4 - Playing with Numbers>SPEEDY TEST>Q 7

If two numbers are co-primes, then at least one of them must be a prime number.