Q: 12 boys were shaking hands with each other while going and coming How many times?

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Each boy shook hands 11 times which would be 132 handshakes but two boys were involved in each therefore 66. Other method: Boy 1 shakes with 11 others, boy 2 has already shaken with boy 1 so has to shake with 10 others and so on. 11 + 10 + 9 ....+ 3 + 2 + 1 = 66

48+47+46.......+2+1 = 1176another way:? 49 x 48 ÷ 2 = 49 x 24 = 1176(Each of the 49 people shakes hands with 48 other people:? 49 x 48A shaking B's hand and B shaking A's hand is the same handshake:? ÷ 2)

66. Each of the 12 members shook hands with the 11 other people. That would make 12*11 hand shakes. BUT, the A shaking B's hand is the same event as B shaking A's hand so all these handshakes are double-counted. The actual number is half that ie 33. If you are more familiar with combinatorial mathematics, the answer is the number of combinations of two obejects from 12, which is 12C2 = 12*11/(2*1)

In geometry, adjacent angles, often shortened as adj. ∠s, are angles that have a common ray coming out of the vertex going between two other rays. In other words, they are angles that are side by side, or adjacent.

The question is ambiguous:If each girl shakes one other person's hand once, then there are seven (7) handshakes.If each girl shakes each other girl's hand once, then there are 7 x 6 x 0.5 = 21 handshakes (each girl x each other girl x cancelling out the doubles).Another way to look at this one:If each girl shakes each of the other girl's hand once, there would be 42 shakes (each girl shakes 6 hands, times 7 girls, an assupmtion is made that each girl is not shaking her own hands, you can't tell much from the question so assuming ensues)

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they say hi hello how are you or shake hands. if they dont listen to you thandont say helloThe shaking of hands came about in middle ages when people carried weapons with them. The shaking of hands showed that they were not holding a weapon in their hands.

they dont know what the other person has done with their hands.

giving gifts and free foods shaking hands kissing (without sin) meeting going to homes of each other etc

One is yours and the other is nokia's president and CEO Stephen Elop.

The force that takes place while shaking hands is the force of contact between the two hands. This force is created by the pressure exerted by each person's hand against the other person's hand. It is a type of normal force that occurs at the point of contact.

Each boy shook hands 11 times which would be 132 handshakes but two boys were involved in each therefore 66. Other method: Boy 1 shakes with 11 others, boy 2 has already shaken with boy 1 so has to shake with 10 others and so on. 11 + 10 + 9 ....+ 3 + 2 + 1 = 66

Vietnamese people commonly greet each other by shaking hands and slightly bowing their heads to show respect. They also shake hands when saying goodbye.

Kissing, shaking hands, touching door knobs or other common items touched by many people.

No but could be associated with diseases that cause tremorsAdditional answer:Some of the medications that treat rheumatoid arthritis or other types of auto-immune disorders, may cause shaking hands or even cause neurological problems. If someone has arthritis and their hands are shaking, they should talk to their doctor.

Everyone shakes hands with 4 other people. Since there are 5 people in the room this would suggest there are 5*4 = 20 handshakes. However, you would then be double counting handshakes: A shaking hands with B and B shaking hands with A is, in reality, only one handshake. Thus there are 5*4/2 = 10 handshakes in all.

Washing your hands. Avoid shaking hands with other people. Cover your nose and mouth when someone else sneezes. When in public keep your hands in your pockets and don't touch anything. Avoid touching your mouth, face and nose with hands. Always use tissue or cloth.