Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 685 · 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.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) yes, mangoes match (c) no, check more (d) no mango is sweet
2. 2.🧩 Rohan bought 3 notebooks and a lunch box for ₹95 in all. Each notebook cost the same. What did one notebook cost? (a) ₹95 (b) ₹92 (c) ₹31 (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.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking your pet (d) asking one friend
5. 5.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) the colour of ink (d) your handwriting
6. 6.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) never see dogs (d) dogs hate you
7. 7.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
8. 8.🧩 Tara is 6 years old. Nisha is older than Tara. How old is Nisha? (a) not enough info (b) 11 (c) 8 (d) 7
9. 9.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
10. 10.🧩 Meera bought 5 mangoes and a cap for ₹115 in all. Each mango cost the same. What did one mango cost? (a) ₹115 (b) ₹110 (c) ₹23 (d) not enough info
11. 11.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 12 (b) 60 (c) not enough info (d) 6
12. 12.🧩 Kabir is 6 years old. Ananya is 4 years older than Kabir. How old is Ananya? (a) 11 (b) 4 (c) not enough info (d) 10
13. 13.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) not enough info (b) 8 PM (c) 7 PM (d) 6 PM
14. 14.🧩 A box has 3 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 28 (b) 10 (c) not enough info (d) 21
15. 15.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 9 PM (d) 8 PM
16. 16.🧩 Meera is 7 years old. Rohan is older than Meera. How old is Rohan? (a) 12 (b) 8 (c) 9 (d) not enough info
17. 17.🧩 Vihaan is 9 years old. Arjun is older than Vihaan. How old is Arjun? (a) 10 (b) 11 (c) 14 (d) not enough info
18. 18.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
19. 19.🧩 Saanvi bought 4 notebooks for ₹160 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) not enough info (c) ₹45 (d) ₹160
20. 20.🧩 Kabir bought 4 pens and a cap for ₹270 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹266 (c) ₹270 (d) ₹67
21. 21.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
22. 22.🧩 Tara is 9 years old. Saanvi is 6 years older than Tara. How old is Saanvi? (a) not enough info (b) 15 (c) 6 (d) 16
23. 23.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
24. 24.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
25. 25.🧩 A box has 6 rows of guavas, with 6 in each row. How many guavas are in the box? (a) not enough info (b) 36 (c) 12 (d) 42
26. 26.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
27. 27.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
28. 28.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
29. 29.🧩 A box of laddoos has 8 in each row. How many laddoos are in the box? (a) 8 (b) 16 (c) 80 (d) not enough info
30. 30.🧩 Nisha is 11 years old. Diya is 2 years older than Nisha. How old is Diya? (a) 2 (b) 14 (c) 13 (d) not enough info
31. 31.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
32. 32.🧩 Diya is 9 years old. Ishaan is older than Diya. How old is Ishaan? (a) 11 (b) not enough info (c) 14 (d) 10
33. 33.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) not enough info (b) 7 (c) 70 (d) 14
34. 34.🧩 Aarav bought 3 kites and a bag for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹117 (b) not enough info (c) ₹40 (d) ₹120
35. 35.🧩 Rohan is 6 years old. Arjun is older than Rohan. How old is Arjun? (a) not enough info (b) 11 (c) 8 (d) 7
36. 36.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
37. 37.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
38. 38.🧩 Kabir bought 5 balls and a cap for ₹100 in all. Each ball cost the same. What did one ball cost? (a) ₹95 (b) ₹20 (c) ₹100 (d) not enough info
39. 39.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
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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