There are ___ zeros in ten crores.

Q.

There are ___ zeros in ten crores.

Q. How many zeros are there in a crore?

Q.

Form a number with:

a) 7 at crores place, 8 at ten-thousands place

b) 3 at lakhs place, 4 at ten-lakhs place

c) 7 at hundreds place, 9 at ones place

d) 1 at thousands place, 0 at tens place

Q. How many 7's are there in the following series which are preceded by 6 which is not preceded by 8 ?
8 7 6 7 8 6 7 5 6 7 9 7 6 1 6 7 7 6 8 8 6 9 7 6 8 7

Q. How many 5s are there in the following number sequence which are immediately preceded by 7 and immediately followed by 6?
7 5 5 9 4 5 7 6 4 5 9 8 7 5 6 7 6 4 3 2 5 6 7 8