Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 265 · 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.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 8 (b) 80 (c) 16 (d) not enough info
2. 2.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 5 PM
3. 3.🧩 Arjun bought 3 notebooks and a cap for ₹115 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹115 (c) ₹38 (d) ₹112
4. 4.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
5. 5.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
6. 6.🥭 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, it is certain (c) yes, mangoes match (d) no, check more
7. 7.🧩 Saanvi is 8 years old. Aarav is older than Saanvi. How old is Aarav? (a) 10 (b) not enough info (c) 13 (d) 9
8. 8.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
9. 9.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
10. 10.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) never see dogs (d) all dogs are mean
11. 11.🧩 A box has 8 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 64 (b) 72 (c) 16 (d) not enough info
12. 12.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
13. 13.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
14. 14.🧩 Rohan bought 6 notebooks for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹30 (c) ₹25 (d) ₹150
15. 15.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) 6 (b) 60 (c) 12 (d) not enough info
16. 16.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
17. 17.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
18. 18.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
19. 19.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
20. 20.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 3 PM
21. 21.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
22. 22.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 3 PM (c) 2 PM (d) 4 PM
23. 23.🧩 Kabir is 7 years old. Saanvi is 5 years older than Kabir. How old is Saanvi? (a) not enough info (b) 13 (c) 5 (d) 12
24. 24.🧩 Meera is 9 years old. Arjun is 6 years older than Meera. How old is Arjun? (a) 16 (b) 6 (c) 15 (d) not enough info
25. 25.🧩 A box has 7 rows of apples, with 6 in each row. How many apples are in the box? (a) not enough info (b) 48 (c) 13 (d) 42
26. 26.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
27. 27.🧩 Nisha bought 6 kites and a lunch box for ₹380 in all. Each kite cost the same. What did one kite cost? (a) ₹380 (b) not enough info (c) ₹63 (d) ₹374
28. 28.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
29. 29.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 90 (b) 18 (c) not enough info (d) 9
30. 30.🧩 Rohan is 7 years old. Arjun is older than Rohan. How old is Arjun? (a) 12 (b) not enough info (c) 9 (d) 8
31. 31.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
32. 32.🧩 Ishaan bought 6 balls and a cap for ₹200 in all. Each ball cost the same. What did one ball cost? (a) ₹194 (b) not enough info (c) ₹200 (d) ₹33
33. 33.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it
34. 34.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
35. 35.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to waste time (d) to be sure of results
36. 36.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
37. 37.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) your handwriting (d) what facts are given
38. 38.🧩 A box has 8 rows of apples, with 4 in each row. How many apples are in the box? (a) not enough info (b) 36 (c) 32 (d) 12
39. 39.🧩 A box has 6 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 11 (b) not enough info (c) 30 (d) 35
40. 40.🧩 Kabir is 11 years old. Diya is 3 years older than Kabir. How old is Diya? (a) not enough info (b) 3 (c) 15 (d) 14

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