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- Question
- Ashu's mother was three times as old as Ashu 5 years ago. After 5 years she will be twice as old as Ashu. How old is Ashu today?
Options- A. 35 years
- B. 10 years
- C. 20 years
- D. 15 years
- Correct Answer
- 15 years
ExplanationSuppose the present ages of Ashu and her mother be P and Q years respectively.
According to question,
5 years ago , 3 × ( ages of Ashu - 5 ) = ages of Ashu's mother - 5
? 3 ( P - 5 ) = Q - 5
? 3P - 15 = Q - 5
? 3P - Q = 10 ... (i)
Again, After 5 years , 2 × ( ages of Ashu + 5 ) = ages of Ashu's mother + 5
? 2(P + 5) = Q + 5
? 2P + 10 = Q + 5
? 2P ? Q = - 5.... (ii)
From equations (i) and (ii) , we get
P = 15 years
Therefore, Ashu is 15 year old at present. - 1. The binary system uses powers of
Options- A. 0
- B. 1
- C. 2
- D. None of the above Discuss
- 2. Find out the odd word/letters/number/number pair from the given alternatives.
Options- A. 64, 23
- B. 42, 12
- C. 63, 18
- D. 83, 20 Discuss
- 3. Hemavathi cut a cake into two halves and cuts one half into smaller pieces of equal size. Each of the small pieces is fifteen grams in weight. If she has nine pieces of the cake in all with her, how heavy was the original cake ?
Options- A. 240 gms
- B. 280 gms
- C. 180 gms
- D. 170 gms Discuss
- 4. Find the odd word/letters/number pair from the given alternatives.
Options- A. 443
- B. 633
- C. 821
- D. 245 Discuss
- 5. Find the odd word/letters/number pair from the given alternatives.
Options- A. RGTF
- B. MLOK
- C. CTES
- D. VDZC Discuss
- 6. Find the odd word/letters/number pair from the given alternatives.
Options- A. Swimming
- B. Sailing
- C. Diving
- D. Driving Discuss
- 7. What does it mean to calculate frequencies within a dataset?
Options- A. to calculate the product of two variables to make a third variable
- B. to count the number of cases that fall into different subgroups within a dataset
- C. to count the number of times a dataset is used by a student
- D. to calculate the sum of a column of variables in a dataset Discuss
- 8. The arithmetic mean of the following numbers 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6 and 7, 7, 7, 7, 7, 7, 7 is ?
Options- A. 6
- B. 9
- C. 7
- D. 5 Discuss
- 9. In a street, there are certain number of houses. People in that street are decided to paint their houses with certain colours. If four houses are painted with each colour, then one house will be left without any colour. If five houses are painted with each colour, then one colour will remain. Find the number of houses in that street ?
Options- A. 25
- B. 6
- C. 32
- D. 7 Discuss
- 10. If in an A.P series 18th term is 29 and 29th term is 18. Then find the 49th term ?
Options- A. -3
- B. -2
- C. 0
- D. 1 Discuss
More questions
Correct Answer: 2
Explanation:
Binary system is what the representation uses only two digits 0 & 1.
It uses only the powers of 2.
Correct Answer: 83, 20
Correct Answer: 240 gms
Explanation:
The nine pieces consist of 8 smaller equal pieces and one half cake piece.
Weight of each small piece = 15 g.
So, total weight of the cake = [2 x (15 x 8)]g = 240 g.
Correct Answer: 633
Correct Answer: VDZC
Correct Answer: Driving
Correct Answer: to count the number of cases that fall into different subgroups within a dataset
Explanation:
Frequency is what means how many times the event occurs in the same period.
Correct Answer: 5
Explanation:
Arithmatic mean = sum/members
=> (1x1 + 2x2 + 3x3 + 4x4 + 5x5 + 6x6 + 7x7) / (1 + 2 + 3 + 4 + 5 + 6 + 7)
=> 140/28 = 5
Correct Answer: 25
Explanation:
Let x be number of houses and y be colors.
on the basis of question
x = 4y+1
x = 5(y-1)
on solving these 2 equations x = 25
Correct Answer: -2
Explanation:
We know that in A.P series
18th term = a + 17d
29th term = a + 28d
But given
a + 17d = 29..........(i)
a + 28d = 18......... (ii)
Solving equation (i) and (ii), we get
d = -1
put d = -1 in any of the above equations and we get,
a = 46
Now, we know 49th term can be written as, a + 48d
putting the value of a and d in the above equation,
a + 48d = 46 + 48(-1)
= 46 - 48
= -2
Hence, the 49th term is -2.
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