LIGHT speed

The distance from the Earth to the Sun is about 100 million miles. The speed of light is 186,000 miles per second. So it takes light eight minutes to reach Earth from the Sun. Let's say the Sun rose at 6am this morning, and that by some freak of physics, the speed of light is suddenly doubled to 372,000 miles per second. If the day were to be somehow repeated, what time would the Sun rise this time?






click on the title for solution.....

Hunting for an answer

Two fathers and two sons, who were all poachers, went out hunting for rabbits. They bagged three in total, but they each took one home for supper. How is this possible?

click on the title for solution....

Rigid cube..! problem

You want to construct a rigid wire skeleton of a one-inch cube by using 12 one-inch wire segments for the cube's 12 edges. These you intend to solder together at the cube's eight corners.

"Why not cut down the number of soldering points," a friend suggests, "by using one or more longer wires that you can bend at sharp right angles at various corners?"

Adopting your friend's suggestion, what is the smallest number of corners where soldering will be necessary to make the cube's skeleton rigid?


click on the title for solution......

GRE daily 10 words :Day 9

exchequer = government department in charge of the revenues
use = *

felicitous = very appropriate, pertinent
use = He summed up the achievements in one or two felicitous phrases

introspective = looking within oneself
use = introspective songs

nuance = shade of meaning, subtlety
use = Linguists explore the nuances of language

fidelity = Loyalty
use = marital fidelity

tolerance = capacity to respect different values
use = religious tolerance

degrade = demean
use = don't degrade woman

colloquial = informal speech
use = colloquial speech

malnutrition = undernourishment
use = suffering from severe malnutrition

burly = husky, brawny
use = a burly policeman