User Forum

A number consists of two digits whose sum is 9. If 27 is added to the number, its digits are interchanged. Given below are the steps to find the number. Identify the wrong step.
Step 1 : Let the unit’s digit be x.
Step 2 : Then, ten’s digit = (9 - x)

∴ Number = 10 × (9 - x) + x ÷ 90 - 10x + x = (90 - 9x)
Step 3 : Adding 27 to the number 90 - 9x we get 117 - 9x
Step 4 : Number with digits interchanged is 10x + (9 - x)= 9x + 9
Step 5 :127 - 9x= 9x + 9
Step 6 : Therefore unit’s digit = 6 and ten’s digit = 3
Step 7 : Hence the number = 36.

A Step 7
B Step 5
C Step 4
D Step 3 and step 6

Which of the following statements are true?
P. A cube has 6 faces and 12 sides.
Q. A cylinder has 3 faces and 0 vertices.

AOnly P
BOnly Q
CBoth P and Q
DNeither P nor Q

Aman, Rahul, Raj and Nikhil each took the same spelling test.
♦ Aman spelled 7/10 of the words correctly.
♦ Rahul spelled 3/4 of the words correctly.
♦ Raj spelled 4/5 of the words correctly.
♦ Nikhil spelled 2/3 of the words correctly.
Who spelled the least number of words correctly and arrange their fraction in ascending order?

A

B

C

D

If the length and breadth of a rectangle are halved, then its perimeter is __________.

ADoubled
BRemain unchanged
CHalved
DNone of these

If then the value of x is

A2
B1
C3
D4

Find the value of


A13
B15
C11
D18

A man sells two horses for ₹ 4000 each, neither losing nor gaining in the deal. If he sold one horse at a gain of 25%, the other horse is sold at a loss of ______.

A
B
C 50%
D 47%

A clock was set at the correct time at 4 : 45 p.m. on Monday. The clock gained 3 minutes each day. What was the actual time when the clock showed 5 : 06 p.m. on next Monday?


A5 : 45 p.m.
B4 : 45 p.m.
C3 : 45 p.m.
D6 : 45 p.m.

There is a definite relationship between figures (1) and (3). Establish a similar relationship between figures (2) and (4) by selecting a suitable figure from the options that would replace the question mark (?) in fig. (4).


A
B
C
D