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Concave lens possesses at least one surface that curves inwards. It is a diverging lens, spreading out those light rays that have been refracted through it. A concave lens is thinner at its centre than at its edges, and is used to correct short-sightedness (myopia). After light rays have passed through the lens, they appear to come from a point called the principal focus. The image formed by a concave lens is virtual, upright, and smaller than the object, and it cannot be projected onto a screen.
A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
13, 38, 150, _____, 4478, 31341.
How many pair of digits in forward and backward direction are there in the number “9257364” that has as many numbers between them as in the ...
A man invested a certain amount of sum at 12.5% per annum simple interest and earned an interest of Rs.2200 after 4 years. If the same amount is investe...
Select the number that can replace the question mark (?) in the following series. 17, 21, 30, 46, 71, ?
Select the correct combination of mathematical signs that can sequentially replace '*' sign and balance the equation given below.
196 * 7 * 45 * ...
The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) is/a...
Select the option that is related to the third number in the same way as the second number is related to the first number and the sixth number is relate...
Three of the following four numbers are alike in a certain way and one is different. Pick the number that is different from the rest .
Select the option in which the numbers are related in the same way as the numbers of the following set.
(25, 18, 225)
Simplify:
