Number System If (74)² is added to the square of a number the answer so obtained is 7780. What is the number ? 49 50 48 47 49 50 48 47 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.or, x² + (74)² = 7780or, x² = 7780 - 5476 = 2304∴ x = 48
Number System Subtracting 30 from a number, the remainder is one fourth of the number. Find the number? 22 1/2 45 30 40 22 1/2 45 30 40 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3/4 x = 30 => x = 40
Number System √2304 x √? = 2832 3381 3481 3681 3581 3381 3481 3681 3581 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √2304 x √? = 2832= 48 x √? = 2832= √? = 2832/48 = 59∴? = 59 x 59 = 3481
Number System If the difference between a number and its three fifths is 62, what is the number ? 155 165 145 175 155 165 145 175 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x - 3x/5 = 62or x = 62 x 5/2 = 155
Number System 7.8% of 12.5 + 2.5% of 161 = ? 5 2 12 9 5 2 12 9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7.8 x 12.5/100 + 2.5 x 161/100= 0.975 + 4.025= 5
Number System What is the difference between the largest and the smallest number written with 7, 7, 0, 7? 6993 6093 6893 693 6993 6093 6893 693 ANSWER DOWNLOAD EXAMIANS APP
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