Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 113 · 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.🧩 Saanvi bought 2 markers for ₹40 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) not enough info (c) ₹20 (d) ₹25
2. 2.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) 6 PM (d) not enough info
3. 3.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
4. 4.🧩 Meera is 9 years old. Vihaan is older than Meera. How old is Vihaan? (a) not enough info (b) 11 (c) 10 (d) 14
5. 5.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
6. 6.🧩 Kabir is 11 years old. Aarav is older than Kabir. How old is Aarav? (a) not enough info (b) 16 (c) 13 (d) 12
7. 7.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) not enough info (b) 2 PM (c) 5 PM (d) 6 PM
8. 8.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
9. 9.🧩 A box has 3 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 24 (b) 9 (c) 18 (d) not enough info
10. 10.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) no, check more (d) yes, it is certain
11. 11.🧩 Aarav bought 4 notebooks and a lunch box for ₹190 in all. Each notebook cost the same. What did one notebook cost? (a) ₹190 (b) ₹47 (c) not enough info (d) ₹186
12. 12.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
13. 13.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to be sure of results (d) to waste time
14. 14.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 4 (b) 8 (c) 40 (d) not enough info
15. 15.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
16. 16.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 3 PM
17. 17.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
18. 18.🧩 Arjun bought 2 notebooks for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹40 (c) ₹45 (d) ₹80
19. 19.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 5 PM (d) 6 PM
20. 20.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 70 (b) 14 (c) not enough info (d) 7
21. 21.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
22. 22.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
23. 23.🧩 Nisha bought 4 balls and a cap for ₹190 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹47 (c) ₹190 (d) ₹186
24. 24.🧩 A box has 3 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 16 (b) 7 (c) not enough info (d) 12
25. 25.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
26. 26.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
27. 27.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
28. 28.🧩 Aarav bought 4 notebooks for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) ₹240 (c) ₹65 (d) not enough info
29. 29.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 8 (b) 16 (c) 80 (d) not enough info
30. 30.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 9 PM (c) 8 PM (d) 7 PM
31. 31.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
32. 32.🧩 Ishaan is 11 years old. Nisha is 3 years older than Ishaan. How old is Nisha? (a) 15 (b) 14 (c) 3 (d) not enough info
33. 33.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
34. 34.🧩 Ishaan is 10 years old. Meera is 7 years older than Ishaan. How old is Meera? (a) not enough info (b) 7 (c) 17 (d) 18
35. 35.🧩 Diya is 12 years old. Tara is 8 years older than Diya. How old is Tara? (a) 8 (b) 20 (c) 21 (d) not enough info
36. 36.🧩 Aarav is 6 years old. Ishaan is 3 years older than Aarav. How old is Ishaan? (a) not enough info (b) 10 (c) 9 (d) 3
37. 37.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
38. 38.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 2 PM (c) 3 PM (d) 4 PM
39. 39.🧩 A box has 3 rows of apples, with 7 in each row. How many apples are in the box? (a) 28 (b) not enough info (c) 10 (d) 21
40. 40.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence

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