12,6,14,12,16,18,18,?,?
Mental ability
Answers
Answer:
2
NTSE (S-I) 2018-19
1. Identify the missing number in the following
sequence
5, 13, 41, 85, ?, 221, 313
(1) 163 (2) 179
(3) 145 (4) 147
Answer (3)
Sol. 22 + 12, 32 + 22, 52 + 42, 76 + 62, 92 + 82, 112 + 102,
132 + 122
2. If 36
31
= 10 and 48 = 4
18
then 64
16 ___________
(1) 3 (2) 4
(3) 5 (4) 6
Answer (2)
Sol. 5 × 6 4 × 8 6 × 4 10 ; 4 ; 4 3 × 1 1 × 8 1 × 6
3. If AR = 36, CM = 78, GP = 224, then ES =
___________
(1) 364 (2) 150
(3) 190 (4) 320
Answer (3)
Sol. AR = 36, CM = 78, GP = 224; ES = 190
(1×8) × 2 (3×13) × 2 (7×16) × 2 (5×19) × 2
4. Boy facing east turbed left and run 200 metres then
turn left and run 200 metres and take turn 45°
towards right and went straight to cover 350 metres.
Now boy is in which direction from starting point?
(1) North–East (2) North–West
(3) South–East (4) South–West
Answer (2)
Sol. North-West
5. In a basket the number of apples is five times the
oranges and the number of bananas is six times the
oranges. Which of the following can be the number
of total fruits in the box?
(1) 156 (2) 200
(3) 140 (4) 136
Answer (1)
Sol. x × 5x + 6x = 12x
156 ÷ 12 = 13
6. Find the missing number in the second figure on the
basis of the number arranged in the first figure.
102
6 8
11 9
72
? 7
12 6
(1) 10 (2) 46
(3) 12 (4) 36
Answer (1)
Sol. (11×8) – (9 × 6) = 34 × 3 = 102
7. Rakesh has six friends to invite. In how many ways
can he send invitation cards to them, if he has three
servants to carry the cards?
(1) 156 (2) 243
(3) 18 (4) 729
Answer (1)
Sol. Three people ⇒ Let x, y, z
x + y + z = 6
No. of ways ⇒ 6 + 3 – 1c3 –1
31 × 26 = 156 ⇒ 28 – 2
⇒ 26
8. Find the number of triangles in the figure.
(1) 28 (2) 32
(3) 36 (4) 40
Answer (3)
Sol. 40
9. How many lines of symmetry does a hendecagon
have?
(1) 13 (2) 7
(3) 9 (4) 11
Answer (4)
Sol. Hendecagon - 11 sides (11side of symmetry)
PART-I : MENTAL ABILITY TEST (MAT)