Bolaning yoshi onasining yoshidan 24 ga kam, otasining yoshi esa onasining yoshidan 5 ga ko'p. Agar bolaning yoshi 12 ga teng bo'lsa, otaning yoshini toping.
- A. 41
- B. 31
- C. 40
- D. 45
Natural sonlar va ular ustida amallar bo‘yicha savol
Javob va yechimni ko‘rish
Javob: 41
Bola yoshi $b=12$ ga teng. Onasining yoshini $m$ deb belgilaymiz. Shartga ko‘ra, bola onasining yoshidan $24$ ga kam:
\[
b=m-24 \;\Longrightarrow\; 12=m-24 \;\Longrightarrow\; m=36.
\]
Endi otasining yoshini $p$ deb olamiz. Otasining yoshi onasining yoshidan $5$ ga ko‘p, ya’ni
\[
p=m+5 \;\Longrightarrow\; p=36+5=41.
\]
Shu bilan otaning yoshi $41$ ga teng, ya’ni javob **A**.
Mavzuni mustahkamlang
Bu savol Natural sonlar va ular ustida amallar mavzusiga tegishli. Ta’riflar, formulalar va misollarni mavzu sahifasida ko‘ring.
Mavzuni o‘rganish