Whole Numbers

MATHEMATICS CLASS -VI Knowing numbers, Playing with numbers Whole numbers Max Marks 30 Time 1 Hr Question no 1 to 6 carries 1 marks each Question no 7 to 12 carries 2 marks each Question no 13 and 16 carries 3 marks each Q1.

The product of the predecessor and successor of even natural number is (a)

Q2.

Divisible by 2 (b) Divisible by 3 (c) Divisible by 4 (d) an odd number

Predecessor of one million is

(b) 99999 Q3.

Q5.

(b) 6

(c) 8

(d) 12

Sum of the prime numbers between 60 and 75 is (a) 199 (b) 201 (c) 211

(d) 272

The difference between greatest and smallest numbers which when rounded off a number to nearest 10s as 540 , is

(a) 8

Q6.

(c) 99999 (d) 999999

Which of the following is perfect number?

(c) 4 Q4.

(b) 9999

(b) 9

(c) 10

(d) 11

The number of three digit number formed by using 3, 5 and 9 taking each digit exactly once is.

(a) 4

(b) 3

(c) 5

(d) 6

Q7.

Write the following in Hindu-Arabic numerals: XICCCXCI VICKXLIX (i)

(ii)

Q8.

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

Q9.

Telegraph poles occur at equal distances of 220 m along a road and heaps of stones are put at equal distance of 300m along the same road. The first heap is at the is at the foot of the first pole. How far from it along the road is the next heap which lies at the foot of a pole?

Q10.

How many whole numbers are there between 21 and 61?

Q11.

Which of the following is true and which is false? (i)

Every whole number has its successor.

(ii)

Every whole number has its predecessor.

(iii)

The smallest 5 digit number is the successor of the largest 4 digit number.

(iv)

0 is less than every natural number.

(v)

0 is the smallest natural number.

(vi)

Between any two whole number there is a whole number.

(vii)

Of the given two natural numbers, the one having more digit is greater.

(viii)

The natural number 1 has no predecessor.

Q12.

Three numbers are in the ratio 1 : 2 : 3, their HCF is 6. Find the number.

Q13.

The HCF of two number is 16 and their product is 3072. Find their LCM

Q14.

Find the smallest number which leaves remainder 8 and 12 when divided by 28 and 32.

Q15.

Give an example of three digit number which is divisible by (i)

2 but not by 4

Q16.

(ii)

3 but not by 6

(iii)

4 but not by 8

(iv)

Both 4 and 8 but not by 32

(a) A number is divisible by 24. By what other numbers will that number be divisible ? (b) Find the prime factors of 1729. Arrange the factors in ascending order, and find the relation between two consecutive number.