The sum of the areas of the 10 squares, the lengths of whose sides are 20 cm, 21 cm,....29 cm respectively is
6085 cm2
8555 cm2
2470 cm2
2470 cm2
A.
6085 cm2
Required sum = 202 + 212 + ......292
= (12 + 22 +.......+292) - (12 + 22+........+192)
A number, when divided successively by 4, 5 and 6 leaves remainders 2, 3 and 4 respectively. The least such number is
50
53
56
58
A number when divided by 361 gives a remainder 47. If the same number is divided by 19, the remainder obtained is
3
8
9
9
If the sum of the digits of a three-digit number is subtracted from that number, then it will always be divisible by
3 only
9 only
Both 3 and 9
Both 3 and 9
The sum of the cubes of two numbers in the ratio 3 : 4 is 5824. The sum of the number is
(5824)1/3
28
24
24
What least value must be assigned to '*' so that the number 451*603 is exactly divisible by 9?
7
8
5
5