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1/ C)
D)
2 /
Solution:
● Let the total number of beads be x.
● The number of red, green, and yellow beads is x−52 x=53 x=126.
● Thus, x=3126×5 =210.
● The number of red beads is 31 ×210=70, so the number of green and yellow beads
together is 126−70=56.
● Let the number of yellow beads be y, then the number of green beads is 43 y. So:
y+43 y=56
● Solving for y: 47 y=56⇒y=756×4 =32
● So, the number of yellow beads is 32.
3 / Area:
● The figure consists of one full circle (formed by combining the two half-circles at
the top) and one half-circle at the bottom.
● Radius of the top full circle = 28 cm / 2 = 14 cm
● Radius of the bottom half-circle = 28 cm
● Area of the top full circle = π * radius^2 = (22/7) * 14 cm * 14 cm = 616 cm^2

● Area of the bottom half-circle = (1/2) * π * radius^2 = (1/2) * (22/7) * 28 cm * 28 cm =
1232 cm^2
● Total area = 616 cm^2 + 1232 cm^2 = 1848 cm^2
4)

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