71) In each of the number-pairs, the second number is obtained by performing a certain mathematical operation on the first number. Three of the following pairs follow the same pattern and thus form a group. Select the number-pair that does NOT belong to that group.
A) 21: 420
B) 25: 600
C) 17: 272
D) 15: 208
View Answer
D) 15: 208
Explanation:We are given number pairs and asked to identify the odd one out based on a pattern.
—
Let’s examine each pair and try to find a consistent pattern (possibly multiplication, squaring, etc.):
—
⇒1. 21 : 420
Try:
21 × 20 = 420 ✅
—
⇒2. 25 : 600
Try:
25 × 24 = 600 ✅
—
⇒3. 17 : 272
Try:
17 × 16 = 272 ✅
—
⇒4. 15 : 208
Try:
15 × 14 = 210 ❌
→ 15 × 13 = 195
→ 15 × 13.86 = 208 — doesn’t fit a clean pattern$
So this one does not follow the same pattern (number × one less than itself).
—
✅ Final Answer: Option: 15 : 208 ✅
Would you like a quick tip sheet on number pattern detection?
72) Ten people are sitting in two parallel rows 1 and 2. A, B, C, D and E are sitting in row 1 facing the North and V, W, X, Y and Z are sitting in row 2 facing the South, in such a way that each member in row 1 faces a member of row 2. Neither A nor B sit at any of the extreme ends of the row. A sits second to the right of B. The one who faces B is an immediate neighbour of Z. Y sits second to the left of Z. The one who faces Y sits second to the left of C. W sits second to the right of V. D is not an immediate neighbour of A.
Who faces E?
A) Y
B) W
C) V
D) X
View Answer
A) Y
73) In a class, four students ranked between Rahul and Sreeja. Sreeja ranked 14th from the top while Rahul ranked 7th from the bottom. How many students are there in the class?
A) 25
B) 26
C) 21
D) 20
View Answer
A) 25
Explanation:We are given:
* Sreeja ranked 14th from the top.
* Rahul ranked 7th from the bottom.
* There are 4 students between Rahul and Sreeja.
Let’s find the total number of students.
—
✅ Shortcut Method:
Total students = (Rank of Sreeja from top) + (Rank of Rahul from bottom) + number of students between them − 1
Total = 14 + 7 + 4 − 1
Total = 24
But 24 is not in the options. Let’s double-check the direction.
There are 4 students between them, so total gap = 4
So the total number of students = Rank of Sreeja from top + Rank of Rahul from bottom + 4 (students in between)
− 1 (since we count one of the boundary students twice)
✅ Final Calculation:
Total = 14 (top rank of Sreeja) + 7 (bottom rank of Rahul) + 4 − 1 = 24
Still 24, and still not an option. But wait — maybe the interpretation is:
If 4 students ranked between them, then total gap between their ranks is 5.
So:
* If Sreeja is 14th from top,
* And Rahul is 5 ranks away from her,
* Then Rahul must be 19th from top.
Now use:
Total students = Rank from top (Rahul) + Rank from bottom (Rahul) − 1
= 19 + 7 − 1 = 25
✅ Correct Answer: 25
74) Which type of missile was the Python-5 test fired by DRDO in April 2021?
A) Air-to-Air Missile
B) Anti-radiation Missile
C) Air-to-Surface Missile
D) Surface-to-Surface Missile
View Answer
A) Air-to-Air Missile
75) The famous Sardar Sarovar dam has been built on which of the following rivers?
