Number System

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161 Find the sum of first 25 natural numbers:

A
432
B
315
C
325
D
335

162 Find out the missing term in the series 5, ?, 15, 75, 525, 4725, 51975

A
5
B
10
C
8
D
6

163 Find out the missing term in the series 1220, 244, ..., 9.76, 1.952

A
48.8
B
49.2
C
47
D
8

164 The wrong number in the series 2, 9, 28, 65, 126, 216, 344 is

A
9
B
65
C
216
D
25

165 Find out the missing term in the series 12, 15, 36, ?, 480, 2415, 14508

A
115
B
109
C
117
D
121

166 656, 432, 320, 264, 236, ?

A
222
B
229
C
232
D
330

167 5, 54, 90, 115, 131, 140, ?

A
149
B
146
C
144
D
152

168 If we divide the unknown two-digit number by the number consisting of the same digit's written in the reverse order, we get 4 as quotient and 3 as remainder. If we divide the required number by sum of it's digit's, we get 8 as a quotient and 7 as a remainder. Find the number?

A
81
B
91
C
71
D
72

169 Consider four digit numbers for which the first two digit's are equal and the last two digit's are also equal. How many such numbers are perfect squares?

A
2
B
4
C
0
D
1

170 The value of $$\left( {99\frac{{95}}{{99}}} \right) \times 99$$    is :

A
9798
B
9997
C
9898
D
9896