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Number System

Number System
Find the least value of 3x + 4y if x2y3 = 6.

7
6
3
10

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

10

Number System
75% of 250 - ?% of 380 = 54.5

33
35
31
39

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

250 x 75/100 - 380 x ?/100 = 54.5= 250 x 75 - 380 x ?= 54.5 x 100= 18750 - 380 x ?= 5450= 380 x? = 18750 - 5450= 13300= ? = 13300/380 = 35

Number System
How many times the keys of a typewriter have to be pressed in order to write first 400 counting numbers?

1192
1092
1082
1200

ANSWER DOWNLOAD EXAMIANS APP

Number System
217 * 217 + 183 * 183 = ?

79698
81268
80698
80578

ANSWER DOWNLOAD EXAMIANS APP

Number System
A certain number when divided by 39 leaves a remainder 20, what is the remainder when the same number is divided by 13?

5
7
0
11

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

39 + 20 = 59/13 = 7 (Remainder)

Number System
9 3/4 + 7 2/17 - 9 1/15 = ?

7 719/1020
9 719/1020
9 817/1020
7 817/1020

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Given sum = 9 + 3/4 + 7 + 2/17 - (9 + 1/15)= (9 + 7 - 9) + (3/4 + 2/17 - 1/15)= 7 + (765 + 120 - 68)/1020 = 7 817/1020

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