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- Question
A teacher multiplies 987 by a certain number and obtains 556781 as her answer. If in the answer, both 6 and 7 are wrong but the other digits are correct, then the correct answer will be
Options- A. 553681
- B. 555181
- C. 556581
- D. 555681
- Correct Answer
- 555681
ExplanationGiven number is 987 = 3 x 7 x 47.
So, required number must be divisible by each one of 3, 7, 47.
None of the numbers in 553681 and 555181 are divisible by 3. While 556581 is not divisible by 7.
Correct answer is 555681. - 1. The area of the largest triangle that can be inscribed in a semicircle of radius 6m is
Options- A. 36 sq.m
- B. 72 sq.m
- C. 18 sq.m
- D. 12 sq.m Discuss
- 2. At a certain rate of interest the compound interest of 3 years and simple interest of 5 years for certain sum of money is respectively Rs. 1513.2 and Rs. 2400. Find the common rate of interest per annum ?
Options- A. 5%
- B. 6%
- C. 4%
- D. 3% Discuss
- 3. Find the logarithm of 144 to the base 23 :
Options- A. 2
- B. 4
- C. 8
- D. None of these Discuss
- 4. The minimum number of half years in which a sum of money kept at 60% compound interest will be quadrupled is ?
Options- A. 2
- B. 4
- C. 3
- D. 6 Discuss
- 5. When 52416 is divided by 312, the quotient is 168. what will be the quotient when 52.416 is divided by 0.0168?
Options- A. 3.12
- B. 312
- C. 3120
- D. None of these Discuss
- 6. The average runs conceded by a bowler in 5 matches is 45 and 15.75 in other 4 matches. What is the average runs conceded by the bowler in 9 matches?
Options- A. 15
- B. 32
- C. 35
- D. 53.5 Discuss
- 7. The average weight of a class of 24 students is 35 kg. If the weight of the teacher be included, the average rises by 400 g. The weight of the teacher is :
Options- A. 45 kg
- B. 46 kg
- C. 47 kg
- D. 48 kg Discuss
- 8. The circumference of a circle is 88 cm, find its area?
Options- A. 616 sq cm
- B. 308 sq cm
- C. 154 sq cm
- D. 77 sq cm Discuss
- 9. From the four corners of a rectangular sheet of dimensions 25 cm x 20 cm, square of side 2 cm is cut off from four corners and a box is made. The volume of the box is
Options- A. 828 cm3
- B. 672 cm3
- C. 500 cm3
- D. 1000 cm3 Discuss
- 10. If the radius of a circle is increased by 14% its area increases by
Options- A. 28 percent
- B. 29.96 percent
- C. 14 percent
- D. 14.98 percent Discuss
More questions
Correct Answer: 36 sq.m
Correct Answer: 5%
Explanation:
Given compound interest for 3 years = Rs. 1513.2
and simple interest for 5 years = Rs. 2400
Now, we know that C.I =
=> 1513.2 = ...........(A)
And S.I = PTR/100
=> 2400 = P5R/100 ..................(B)
By solving (A) & (B), we get
R = 5%.
Correct Answer: 4
Explanation:
Correct Answer: 6
Explanation:
Let us assume Amount be 100 Rs and we calculate in CI
First year 60% of 100 = 60 amount (100+60) is 160
Second year 60% of 160 = 96 amount (160+96) is 256
Third year 60% of 256 =153.6 amount (256+153.6) is 409.6
Here the Amount of 100 Rs is quadrapled in 3 years.
One year contains 2 half years
Three year has 6 half years.
Therefore, It takes 6 half years.
Correct Answer: 3120
Explanation:
Given,
Now ,
Correct Answer: 32
Correct Answer: 45 kg
Explanation:
Weight of the teacher = (35.4 x 25 - 35 x 24) kg = 45 kg.
Correct Answer: 616 sq cm
Correct Answer: 1000 cm3
Correct Answer: 29.96 percent
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