Q. 51. What is the smallest number of five digits formed by using the digits 2, 4, 0, 3, 5?
(A) 02345
(B) 20345
(C) 23450
(D) 20354
Answer:
(B) 20345
Explanation:
To form the smallest 5-digit number, sort the digits in ascending order but avoid placing 0 at the first position (which would make it a 4-digit number). The correct order is 20345.
Q. 52. If each side of a square is increased by 20%. Find the percentage increase in its area.
(A) 20%
(B) 25%
(C) 36%
(D) 44%
Answer:
(D) 44%
Explanation:
The successive percentage increase formula is . For an area of a square, .
Q. 53.
(A) 29600
(B) 46000
(C) 20400
(D) 36000
Answer:
(B) 46000
Explanation:
Using the algebraic identity , we get .
Q. 54. What was the day of the work on June 1998 ?
(A) Sunday
(B) Monday
(C) Tuesday
(D) Friday
Answer:
(C) Tuesday
Explanation:
By calculating odd days from 1st Jan 0001 up to 16th June 1998, we find there are 2 remaining odd days, which conventionally maps to Tuesday on the Gregorian calendar.
Q. 55.
(A) 3050
(B) -3050
(C) -4842
(D) 4842
Answer:
(B) -3050
Explanation:
According to BODMAS, multiplication precedes addition. . Then, .
