Question

I FILL IN THE BLANKS

1) 1 is neither
nor
2) The HCF of two consecutive odd numbers is
3) Two perfect numbers are and
4) The smallest composite number is
5) The smallest prime number is
CHOOSE THE CORRECT ANSWER

6) Which of the following are co-primes?
a) 91, 72 b) 34, 51 c) 21,36 d) 15,20
7) The LCM of 24,36,40 is
a) 4 b) 90 c) 360 d) 720
8) Which of the following is a prime number?
a) 143 b) 131 c) 147 d) 161
9) What least number should be replaced for * so that the number 67301 * 2
is exactly divisible by 9?
a) 5 b) 6 c) 7 d) 8
10 The LCM of two co-prime numbers is their
a) sum b) difference c) product d) quotient
VERY SHORT ANSWER TYPE QUESTIONS

11) Test the divisibility of 137269 by 11.
12) Test the divisibility of 529124 by 8.
IV SHORT ANSWER TYPR QUESTIONS

13) Find the least 3 -digit number which is exactly divisible by 20, 25, 30.
14) Find the LCM of:
a) 48, 96, 108 b) 28,36,45,60
15) Find the HCF of:
a) 71, 108, 180 b) 84, 120, 138
V LONG ANSWER TYPE QUESTIONS

16) Three bells toll at intervals of 9, 12, 15 minutes. If they start tolling
together after what time will they next toll together?
17) Find the least number which when divided by 25, 40, and 60 leaves 9 as
the reminder in each case.

NO SPAM PLS.OR ELSE I WILL HAVE TO REPORT.IF YOU DON'T KNOW THEN PLS DON'T ANSWER​

Answer 1

Answer:

5) The smallest prime number is 2

4) The smallest composite number is 4

Answer 2

Answer:

1) prime,composite

2) 1

6) 91,72

7) c) 360

8) b) 131

9) d) 8

10) c) product

13) 300

14) a)864

17) 609