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Number System

Number System
(√6 + 1)² = ? + 2√6

6
8
7
5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = (√6 + 1)² - 2√6= (√6)² + 2 x √6 + 1 + 1² - 2√6= 6 + 2√6 + 1 - 2√6 = 6 + 1 = 7

Number System
The sum of three consecutive even numbers is 252. What is the sum of the smallest and the largest numbers?

170
169
171
168

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

168

Number System
What should come in place of the question mark (?) in the following number series ? 888 888 444 148 ? 7.4

37
35
33
29

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

888 ÷ 1 = 888888 ÷ 2 = 444444 ÷ 3 = 148148 ÷ 4 = 3737 ÷ 5 = 7.4

Number System
Three numbers which are co-prime to one another are such that the product of the first two 551 and that of the last two is 1073. The sum of the three numbers is

110
85
74
93

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

85

Number System
65 x 288 ÷ 52 = 1.8 x ?

190
200
210
180

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 65x288/52x1.8 = 200

Number System
The digit in unit's place of a three digit number is thrice the digit in ten's place & the digit in hundred's place is two-third of the digit in ten's place. If the sum of three digits of number is 14

215
211
221
239

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the ten's digit be x.∴ Unit's digit = 3xHundered's digit = 2x/3∴ x + 3x + 2x/3 = 14= 3x + 9x + 2x = 14 x 3= 14x = 14 x 3= x = 3∴ Number = 239

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