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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

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Q: 12 boys were shaking hands with each other while going 7 coming How many times?
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12 boys were shaking hands with each other while going and coming How many times?


How many handshakes if 49 people shake hands with every other person in room?

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)

12 members were present at a board meeting each member shook hands with all of the other members before and after the meeting how many hand shakes were there?

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)

What is a adjacnet angle?

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.

If 7 girls shake hands only once how many handshakes does that make?

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)

Related questions

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


What is the process of shaking hands with the other team called?

Good Sportsmanship...

Why do people greet each other?

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.

What rule stops Muslims from shaking your hand?

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

What are the celebrations Shia Muslims do during Eid al-Ghadeer?

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

When you switch on nokia mobile you see two hands shaking whose are those hands?

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

Which force takes place while shaking hands?

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.

How do people greet each other in Vietnam?

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

What are the ways to get sick?

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

Does arthritis cause shaking hands?

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.

There are five people in a room Each person shakes the hand of every other person exactly once How many handshakes are exchanged?

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.

What are some behaviors that can prevent you from getting sick?

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.