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- Question
If ab=45 and bc=1516 , then c2-a2c2+a2 is :
Options- A. 7/5
- B. 7/25
- C. 7/125
- D. 7
- Correct Answer
- 7/25
Explanation=
- 1. 50.003% of 99.8÷49.988 = ?
Options- A. 2
- B. 0
- C. 1
- D. 50 Discuss
- 2. 18800÷470÷20=?
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 3. If x = 1 - q and y = 2q + 1, then for what value of q, x is equal to y ?
Options- A. 0
- B. 1
- C. -1
- D. -2 Discuss
- 4. If a - b = 3, a2+b2=29 , find the value of ab.
Options- A. 10
- B. 12
- C. 15
- D. 18 Discuss
- 5. Two numbers are such that the sum of twice the first number and thrice the second number is 36 and the sum of thrice the first number and twice the second number is 39. Find the difference between the numbers?
Options- A. 15
- B. 3
- C. 9
- D. 6 Discuss
- 6. 5 + 2 x 10/2 = ?
Options- A. 15
- B. 35
- C. 10
- D. 20 Discuss
- 7. 5 sin(x)+ 12 cos(x) + r is always greater than or equal to zero. What is the smallest value satisfied by 'r' ?
Options- A. -13
- B. 11
- C. 13
- D. -11 Discuss
- 8. A secret can be told to only 3 persons in 3 minutes. Each person in turn tells 3 other persons in the next 3 minutes and the processes continues accordingly. In 30 minutes how many persons can be told this secret in this way ?
Options- A. 88572
- B. 77854
- C. 99584
- D. 55654 Discuss
- 9. A tailor has 37.5 metres of cloth and he has to make 8 pieces out of a metre of cloth. How many pieces can he make out of half of the cloth he has ?
Options- A. 300
- B. 150
- C. 175
- D. 200 Discuss
- 10. Simplify the following equation [K-L2-K+L2]4K = a/b
Options- A. K = b /a
- B. bL = -a
- C. KL = 1
- D. aK = -b Discuss
Simplification problems
Search Results
Correct Answer: 1
Explanation:
50.003% of 99.8 ÷ 49.988 = ?
? ~= (50 x 100/100)/50
? ~= (50 x 100)/(100 x 50)
? ~= 1
Correct Answer: 2
Explanation:
Given Expression = = = 2
Correct Answer: 0
Explanation:
x = y <=> 1 - q = 2q + 1 <=> 3q = 0 <=> q = 0.
Correct Answer: 10
Explanation:
2ab=
29-9=20
=>ab=10
Correct Answer: 15
Explanation:
Let the required two numbers be a, b
From the given data,
2a + 3b = 36 .....(1)
3a + 2b = 39 .....(2)
Now, by solving 1 and 2 eqnts, we get
5a = 45
a = 9 ....(3)
Put (3) in (1), we get
2(9) + 3b = 36
=> 18 + 3b = 36
3b = 36 - 18
=> b = 18/3 = 6
Required, difference between the numbers = a + b = 9 + 6 = 15.
Correct Answer: 15
Explanation:
Using BODMAS Rule,
First solve division, mutiplication and Addition
So here 10/2 = 5
Then 2 x 5 = 10
Now, 5 + 10 = 15.
Hence, 5 + 2 x 10/2 = 15.
Correct Answer: 13
Explanation:
Given,
5sinx + 12cosx ? -r
cosx) ? -r
= cosA => sinA =
=> 13(sinx cosA + sinA cosx) ? -r
=> 13(sin(x + A)) ? -r
we know that , -1 ? sin (angle) ? 1
=> 13sin (x + A) ? -13
Correct Answer: 88572
Explanation:
Given a secret is told to 3 persons in 3 minutes.
And if the process continues with each person saying 3 other persons,
In 30 minutes => the rocess for 10 times because each person time is 3 minutes.
Required number of persons =
Now it forms a geometric progression,
Sum to n terms is
Here a = 3, r = 3
=> 59048 x 3 /2
= 88572.
Correct Answer: 150
Explanation:
Half of the cloth = 37.5/2
From 1 meter he will make 8 pieces
=> in 37.5/2 ---- ?
37.5/2 x 8
= 150.
Correct Answer: bL = -a
Explanation:
=> - 4KL/4K = a/b
=> L = - a/b
=> bL = -a
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