Playing with numbers Maths - Playing with numbers

Mark the correct alternative in the following: Every counting number has an infinite number of

Mark the correct alternative in the following: The least prime is:

Mark the correct alternative in the following: Which of the following numbers is a perfect number?

State true (T) of false (F):
Two consecutive numbers cannot be both primes.

Test the divisibility of the following numbers by 4:
1020531

Fill in the blank in the following:
1 is neither _____ nor ______.

Test the divisibility of the following numbers by 2:
984325

Make a list of seven consecutive numbers, none of which is prime.

Determine the L.C.M of the numbers given below:
18, 17

Determine the L.C.M of the numbers given below:
180, 384, 144

Find the H.C.F of the following numbers using prime factorization method:
150, 140, 210

Which of the following numbers are divisible by 21?
21063

Determine prime factorization of the following numbers:
468

For the following pairs of numbers, verify the property:
Product of the number = Product of their H.C.F and L.C.M
87,145

Show that the following pairs are co-prime:
875,1859

A merchant has 120 litres of oil of one kind, 180 liters of another kind and 240 litres of third kind. He wants to sell the oil by filling the three kinds of oil in tins of equal capacity. What should be the greatest capacity of such a tin?

In the following numbers. replace * by the smallest number to make it divisible by 11:
9 × 8071

During a sale, colour pencils were being sold in packs of 24 each and crayons in packs of 32 each. If you want full packs of both and the same number of pencils and crayons, how many each would you need to buy?

Determine the number nearest to 100000 but greater than 100000 which is exactly divisible by each of 8, 15 and 21.