Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 115 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
2. 2.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
4. 4.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Rohan is 7 years old. Ananya is older than Rohan. How old is Ananya? (a) not enough info (b) 12 (c) 8 (d) 9
6. 6.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
7. 7.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 70 (b) not enough info (c) 7 (d) 14
8. 8.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Tara bought 2 notebooks and a lunch box for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹150 (c) ₹75 (d) ₹148
10. 10.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
11. 11.🧩 Nisha is 12 years old. Arjun is older than Nisha. How old is Arjun? (a) 13 (b) not enough info (c) 17 (d) 14
12. 12.🧩 Diya is 7 years old. Tara is 5 years older than Diya. How old is Tara? (a) not enough info (b) 5 (c) 12 (d) 13
13. 13.🧩 Ananya is 11 years old. Arjun is older than Ananya. How old is Arjun? (a) 16 (b) 13 (c) not enough info (d) 12
14. 14.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
15. 15.🧩 Vihaan bought 4 pens for ₹100 in all. Each pen cost the same. What did one pen cost? (a) ₹100 (b) ₹25 (c) ₹30 (d) not enough info
16. 16.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
17. 17.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
18. 18.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
19. 19.🧩 Vihaan is 7 years old. Rohan is 9 years older than Vihaan. How old is Rohan? (a) not enough info (b) 17 (c) 9 (d) 16
20. 20.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) no mango is sweet (c) yes, it is certain (d) yes, mangoes match
21. 21.🧩 Ishaan bought 2 kites and a water bottle for ₹110 in all. Each kite cost the same. What did one kite cost? (a) ₹110 (b) not enough info (c) ₹108 (d) ₹55
22. 22.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
23. 23.🧩 Nisha is 9 years old. Vihaan is older than Nisha. How old is Vihaan? (a) not enough info (b) 14 (c) 10 (d) 11
24. 24.🧩 Diya bought 3 kites for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹120 (b) ₹45 (c) ₹40 (d) not enough info
25. 25.🧩 A box has 6 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 12 (b) 36 (c) 42 (d) not enough info
26. 26.🧩 Ananya bought 2 mangoes and a cap for ₹80 in all. Each mango cost the same. What did one mango cost? (a) ₹40 (b) ₹80 (c) not enough info (d) ₹78
27. 27.🧩 A box has 4 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 8 (b) 20 (c) 16 (d) not enough info
28. 28.🧩 A box has 3 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 9 (b) not enough info (c) 24 (d) 18
29. 29.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 9 PM (c) 8 PM (d) not enough info
30. 30.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 60 (b) 12 (c) not enough info (d) 6
31. 31.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) 7 PM (d) not enough info
32. 32.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
33. 33.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
34. 34.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
35. 35.🧩 Ananya is 12 years old. Aarav is 4 years older than Ananya. How old is Aarav? (a) not enough info (b) 16 (c) 17 (d) 4
36. 36.🧩 Meera is 6 years old. Diya is 2 years older than Meera. How old is Diya? (a) 8 (b) 2 (c) not enough info (d) 9
37. 37.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
38. 38.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
39. 39.🧩 Meera bought 5 kites and a cap for ₹220 in all. Each kite cost the same. What did one kite cost? (a) ₹220 (b) ₹44 (c) ₹215 (d) not enough info
40. 40.🧩 Tara bought 4 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹15 (c) ₹60 (d) ₹20

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