Olympiad Test Level 2: Number’s Magic- 1 - Class 4 MCQ

The rule followed here is sum of all the numbers given on the sides is equal to the number given in the centre.
In figure 1, sum of numbers = 1 + 2 + 4 + 3 + 5 = 15
In figure 2, sum of numbers = 3 + 2 + 1 + 5 + 6 = 17
Therefore, the centre number is equal to the sum of numbers = 4 + 4 + 2 + 3 + 5 = 18

Perimeter is calculated by adding the length of the sides surrounding a shape.
Here, we have 22 sides, if we add all the sides of identical sides.
Each side length = 3 cm
Therefore, Perimeter = 22 x 3 = 66 cm

In the given figure, total number of triangles = 20
Number of triangles with lines = 7
Number of triangles with dots = 7
Number of blank triangles = 6
Therefore, option B is correct, as fraction of triangles with dots = 7/20.

A square has 4 lines of symmetry.

Goats and cows have 4 legs.
Total legs = (4 + 3) x 4 = 28 legs

As apples and oranges come under fruits, option A correctly depicts their relationship.

Let's analyze each option:

A: 17 + 6 = 23
B: 23 × 0 = 0
C: 23 − 0 = 23
D: 21 + 2 = 23

The result of options A, C, and D is 23, while the result of option B is 0.

Thus, the odd one out is B: 23 * 0.

We should add quantities with the same unit of measurement.
Here adding 936 ml + 95 ml = 1031 ml = 1 l 31 ml
Now adding litre quantities = 72 + 12 + 1 = 85 l
Therefore, final answer is 85 l 31 ml.

Number of bulbs Factory U sell in given 4 months = 2545 + 1268 + 1864 + 2154 = 7831.

Value of 1 Star = 33
Value of 1 circle = 22
33 + 22 + 22 = 77