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- Question
If a+bab=21 , then the value of (a-b) is
Options- A. 1
- B. 0
- C. -1
- D. 2
- Correct Answer
- 0
- 1. Simplify : 69 X 69 X 69 -65 X 65 X 669 X 69 + 69 X 65 + 65 X 65
Options- A. 1
- B. 4
- C. 0.216
- D. 0.164 Discuss
- 2. A bag contains 25 paise, 50 paise and 1 Rs coins. There are 220 coinsinall and the total amount in the bag is Rs. 160. If there arethrice as many 1 Rs. coins as there are 25 paise coins, then what is the number of 50 paise coins?
Options- A. 60
- B. 40
- C. 120
- D. 80 Discuss
- 3. Given that tan(? + 15°) = ?3. Then the value of ? is?
Options- A. 15°
- B. 75°
- C. 45°
- D. 65° Discuss
- 4. The mode of the data -3, 4, 0, 4, -2, -5, 1, 7, 10, 5 is
Options- A. 0
- B. 4
- C. -2
- D. 7 Discuss
- 5. What is the simplified value of Sec ACot A + Tan A2 ?
Options- A. 1 ? cos2A
- B. 2sin2A
- C. sec2A
- D. 0 Discuss
- 6. If x = 1 + ?2 + ?3, then the value of x2-2x-4=0
Options- A. ?6
- B. 2?3
- C. 3?2
- D. 2?6 Discuss
- 7. If 2x-y2+(3y-2z)2=0, then the ratio of x:y:z is
Options- A. 1 : 3 : 2
- B. 1 : 2 : 3
- C. 3 : 1 : 2
- D. 3 : 2 : 1 Discuss
- 8. If (4a-3)2=0, then the value of 64a3+12a+13 is
Options- A. 0
- B. 11
- C. 22
- D. 33 Discuss
- 9. The value of cos220°+cos270° is
Options- A. 0
- B. 1
- C. 1/2
- D. 13 Discuss
- 10. If a=101 then the value of a(a2-3a+3) is
Options- A. 1000000
- B. 1010101
- C. 1000001
- D. 999999 Discuss
Simplification problems
Search Results
Correct Answer: 4
Explanation:
69 ?65 = 4
69
?
65 = 4
Correct Answer: 60
Explanation:
Let there be x one rupee coin, y 50 paise coin, z 25 paise coinx + y + z = 220......(i)
Total amount = 160
Now, x + (y/2) + z = 160 ......(ii)
?4x + 2y + z = 640
Thrice as many 1 re coin as 25 paise
?x = 3z ......(iii)
On solving equation (i), (ii) and (iii), we get
z = 40x= 3* 40 = 120y = 220 ?(120 + 40 ) = 60
So, 50 paise coin =60
Correct Answer: 45°
Correct Answer: 4
Correct Answer: 1 ? cos2A
Correct Answer: 2?6
Correct Answer: 1 : 2 : 3
Correct Answer: 22
Correct Answer: 1
Correct Answer: 1000001
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