Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 624 · 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.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
2. 2.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
3. 3.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) not enough info (d) 4 PM
4. 4.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 50 (b) 5 (c) not enough info (d) 10
5. 5.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 4 PM (d) 5 PM
6. 6.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
7. 7.🧩 Vihaan is 6 years old. Kabir is older than Vihaan. How old is Kabir? (a) 8 (b) not enough info (c) 11 (d) 7
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.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
10. 10.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
11. 11.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
12. 12.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
13. 13.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) dogs hate you (d) that one dog barked
14. 14.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) not enough info (b) 5 PM (c) 9 PM (d) 8 PM
15. 15.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
16. 16.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
17. 17.🧩 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
18. 18.🧩 A box has 7 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 15 (b) 64 (c) 56 (d) not enough info
19. 19.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 6 PM (d) 5 PM
20. 20.🧩 Meera is 8 years old. Nisha is older than Meera. How old is Nisha? (a) 10 (b) 9 (c) not enough info (d) 13
21. 21.🧩 Meera bought 4 mangoes for ₹80 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹25 (c) ₹80 (d) ₹20
22. 22.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
23. 23.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
24. 24.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 2 PM (c) 3 PM (d) not enough info
25. 25.🧩 A box has 6 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 28 (b) not enough info (c) 10 (d) 24
26. 26.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
27. 27.🧩 Aarav is 7 years old. Meera is 6 years older than Aarav. How old is Meera? (a) 6 (b) 13 (c) not enough info (d) 14
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.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 4 PM (d) 7 PM
30. 30.🧩 Arjun bought 2 pens and a cap for ₹150 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹150 (c) ₹75 (d) ₹148
31. 31.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
32. 32.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking one friend (d) asking the whole class
33. 33.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
34. 34.🧩 Tara bought 5 notebooks for ₹125 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) not enough info (c) ₹125 (d) ₹25
35. 35.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to waste time (d) to change answers
36. 36.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no, check more (c) no mango is sweet (d) yes, it is certain
37. 37.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 8 (b) 40 (c) not enough info (d) 4
38. 38.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) not enough info (b) 8 (c) 80 (d) 16
39. 39.🧩 A box has 4 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 13 (b) 36 (c) not enough info (d) 45
40. 40.🧩 Kabir bought 6 pens and a cap for ₹180 in all. Each pen cost the same. What did one pen cost? (a) ₹180 (b) not enough info (c) ₹30 (d) ₹174

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