Adam who is 20 years old is 4 times as old as Mary. What will be Mary’s age when Adam is twice as old as her?

Read the passage carefully and choose the correct answer to each question out of the four alternatives.

Did the earth always____(i)_____ as it does today? No, __(ii)____ its origin about 4.8 billion year ago, our planet has ___(iii)____ a lot of changes. The initial ball of fire ___(iv)___ down and the surface slowly ___(v)__ solid. Today we know that the Earth’s crust is divided into several plates, which move continuously. Entire continents have been displaced and mountains, islands and new seas have been formed or have disappeared.

Fill in the blank at (iii).

If $$ {x+3y-{2z\over 4}}=6$$ , $$ {x+{2\over 3}}(2y+3z)=33$$ and $$ {1\over 7}{(x+y+z)+2z=9}$$, then what is the value of $$ {46x+131y}$$?

In a line 13 persons are sitting. A is seventh from the beginning and two persons 15. sits between G and A. Persons between A and L is same as persons between G and Q, Then what is the position of Q from the beginning?

In which state has the National TT Training (Practice) Center been approved by SAI?

In how many different ways can letters of the word ‘SECOND’ be arranged?