Question

1.how many 7-digit numbers are there in all?
2.write the the largest and smallest numbers using each of the digits 1,4,6,8,0 only once and find their difference
3.Write the successor and predecessor of 9999 and find their difference?
Round off each of the following to the n thousand:
a) 1046
d) 4031
b) 5624
e) 519
c) 4323
f) 4309
5.Write 86324805 separating periods in Arabic system.
6.Write the roman-numbers from 151 to 189.
7.Test the divisibility of 5869473 by 11.
8. On diving 5035 by 31 the remainder is 13 find the quotient.
9. The HCF of two numbers is 15 and their product is 1650. Find their LCM.
10. Write all prime number between 50 to 5.
11. Write seven consecutive composite numbers less than 100 having no prime number between them.
12. What least number should be replaced for * so that the number 67301*2 is exactly divisible by 9?
13. 28. When reduced to lowest term.
391
14. Fill in blanks:-
a) 1 is neither_______ nor________

b) The smallest composite number is______
c) The smallest prime number is _______
d) The HCF of two consecutive odd number is ______
e) Two perfect numbers are _____ and ______
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Answer 1

Answer:

2) largest=80641

smallest=10468

3) successor=100000

predecessor=9998

round of 1000,4000,6000,500,4000,4000