MATHEMATICSCLASS -VI

Knowing numbers, Playing with numbers Whole numbers Max Marks 30

Time 1 HrQuestion no 1 to 6 carries 1 marks eachQuestion 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) Divisible by 2 (b) Divisible by 3 (c) Divisible by 4 (d) an odd number Q2. Predecessor of one million is

(b) 99999 (b) 9999 (c) 99999 (d) 999999

Q3. Which of the following is perfect number? (c) 4 (b) 6 (c) 8 (d) 12

Q4. Sum of the prime numbers between 60 and 75 is (a) 199 (b) 201 (c) 211 (d) 272

Q5. The difference between greatest and smallest numbers which when

rounded off a number to nearest 10s as 540 , is (a) 8 (b) 9 (c) 10 (d) 11

Q6. 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:

(i) XI CCCXCI (ii) VI CKXLIX

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(ii) 3 but not by 6(iii) 4 but not by 8(iv) Both 4 and 8 but not by 32

Q16. (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.